Vacuum-supporting device



Sept. 4, 1923. 1,466,961

J. H. PRIM VACUUM SUPPORTING DEVICE Filed y 31. 1921 INVENTOR ATTORNEY Patented Sept. 4, 1923.

JOSEPH H. PRIDE, OF SAGINAW, MICHIGAN, ASSIGNOR OF ONE-FOURTH T-O FLOYD PRIM, 0F SAGINAW, MICHIGAN. e"

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Application filed May 31, 1921. Serial No. 473,759.

To all whom it may concern:

Be it known that I, JOSEPH H. Plum, a citizen of the United States residing at Saginaw, in the county of Saginaw and State of Michigan, have invented certain new and useful Improvements in Vacuum- Supportin Devices; and I do hereby declare the ollowing to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to vacuum supporting devices and pertains more particularly. to that class of supporting devices wherein spring arms project from a vacuum cup and the arms en age the glass plate or other surface to whic the cup is secured.

. My improvement relates more articularly to the construction and mode 0 operation of the spring arms in combination with a vacuum cup.

The improvement-includes a spring arm structure that is simple and inexpensive and capable of being stamped from a single piece of sheet metal.

My improved spring arm construction also comprises a fastening arrangement whereby the arms can be quickly and securely fastened to the vacuum cup. The arms also are provided with means whereby any arm may be raised independently of the others,

and are also provided with means whereby threads or cords can be quickly attached to the arms, for use in arranging window decorations and for similar purposes.

With the foregoing and certain other objects in view, which will appear later in the specification, my invention comprises the devices described and claimed and the equivalents thereof.

In the drawings, Fig. 1 is a top plan view of my improved vacuum sup orting device.

Fig. 2 is a central vertical section taken on the line 2-2 of Fig. 1.

In the drawings, 1 re resents a vacuum cup of rubber or other sultable material and 2 is a central boss formed integral therewith, the boss being formed with a circumferential groove 3. The spring arm structure comprises an apertured plate 4 which when assembled on the vacuum cupA 1 is received in the groove 3. The plate 4 as a plurality of laterally extending spring arms 5, the ,ends of which curve downwardly and terminate in elongated feet 6, the edges of these feet engaging the plate of glass oroth'er surface to which the vacuum cup may be secured.

Each of the feet 6 is preferably provided with a projection 7 which may be struck up from the metal of the plate to form a niche into which the finger nail may be inserted to lift the foot 6 so thata sheet of paper or other article to be attached to the foot.

Similarly a hook 8 is formed by striking up the metal of the arm. This hook is adapted to receive a thread or string which holding surface may be inserted beneath the may thus be anchored to the holding sur- 7 face.

To firmly hold the plate 4 in position on the boss 2, I provide a hook, eyelet, knob or similar device 9 having a shank 10 terminating in a flange 11 and carrying a The shank 10 and flange 11 are preferably molded into and thereby forme integral with the boss 2. The washer 12 is preferably flanged upwardly around its periphery as shown in cord 13 may be anchored thereto by passing the cord under the edge of the washer 12,

thereby wedging it between the top of the boss 2 and theedge of the washer.

washer 12. 7

Fig. 2, so that a string or flexible The outside diameter of the washer 12 is 95 preferably such as to permit the washer to be passed through the central opening of the plate 4. Theplate 4 may be secured to the rubber boss 2 by forcing the plate downwardly over the washer 12 until the edge of the central openmg of the plate is received in the annular groove 3 of the boss 2, as shown in Fig. 1.

Washer 12, being of almost the same size as the opening plate from being removed from the boss 2, because of the resistance to shearing of the top part of the rubber boss 2, thereby securely locking the plate 4 in place in the groove of the boss By the means above described, I have produced a simple an inexpensive vacuum supporting device in which the spring arms are provided with anchorages for cords and each arm is provided with independent lifting means. The central plate'gw ich carries the plurality of arms is assembled with and firmly anchored to the central boss of the in plate 4, will prevent the erally projecting elongated foot, each foot formed with a lifting niche therein, and a hook on said plate near one end of each of said spring arms, a washer received on said 5 boss, thev circumferential edges of said washer flanged upwardly and adapted to receive and wedge a cord between said washer and the top of said boss. 7 In testimony whereof, I afiix my signature.

JOSElH H. PRIM. 

